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Eichhornia Kunth = Pontederia

Monochoria C.Presl = Pontederia

Pontederia L.

Last edited by Pieter B. Pelser, 2 December 2020

  1. Pontederia crassipes Mart., Nov. Gen. Sp. Pl. 1 (1824) 9; --Eichhornia crassipes (Mart.) Solms in A.DC. & C.DC., Monog. Phan. 4 (1883) 523; --Merr., EPFP 1 (1922) 200; --Backer, Fl. Males. ser. 1, 4 (1951) 255; --Type: from Brazil (lecto). Native to N South America. Introduced in the tropics and subtropics worldwide. In the Philippines since around 1912 as an ornamental, now an ubiquitous weed clogging water courses all over the country. Water hyacinth. Invasive species (CABI 2017, as Eichhornia crassipes). Photos
  2. Pontederia hastata L., Sp. Pl. (1753) 288; --Monochoria hastata (L.) Solms in A.DC. & C.DC., Monog. Phan. 4 (1883) 523; --Merr., Fl. Manila (1912) 141; EPFP 1 (1922) 200; --Backer, Fl. Males. ser. 1, 4 (1951) 258; --Type: from Sri Lanka (lecto). Bangladesh, China, India, Indonesia, Laos, Malaysia, Myanmar, Nepal, New Guinea, Sri Lanka, Thailand, Vietnam, Philippines. Throughout the Philippines at low and medium elevation; common in open wetlands, swamps, etc.
  3. Pontederia vaginalis Burm.f., Fl. Indica (1768) 80; --Monochoria vaginalis (Burm.f.) C.Presl, Rel. Haenk. 1 (1827) 128; --Merr., Fl. Manila (1912) 141; EPFP 1 (1922) 200; --Backer, Fl. Males. ser. 1, 4 (1951) 256; --Type: from India (lecto). --Monochoria vaginalis var. pauciflora (Blume) Merr., EPFP 1 (1922) 201; --Pontederia pauciflora Blume, Enum. Pl. Javae 1 (1827) 32. Afghanistan, Australia, Bangladesh, Bhutan, Cambodia, China, Fiji, India, Indonesia, Iran, Japan, Korea, Laos, Malaysia, Myanmar, Nepal, Pacific Islands, Pakistan, Papua New Guinea, Russia, Sri Lanka, Thailand, Vietnam, Philippines. Throughout the Philippines from the lowlands up to 2000m; common in periodically inundated or water-logged open waste sites, rice paddies, swamps, etc. Photos

Possibly present:

  1. Pontederia azurea Sw., Prodr. (1788) 57; --Eichhornia azurea (Sw.) Kunth, Enum. Pl. 4 (1843) 129. C and S America. Not native to the Philippines. Reported for the Philippines by Moody (1989) as a weed in rice, but no specimens cited.


Ron Boos kindly provided some of the photos on this web page.


Backer, CA. 1951. Pontederiaceae. Flora Malesiana series 1, 4: 255-261

CABI Invasive Species Compendium

Moody, K. 1989. Weeds reported in rice in South and Southeast Asia. IRRI, Philippines

Pellegrini, MOO, CN Horn & RF Almeida. 2018. Total evidence phylogeny of Pontederiaceae (Commelinales) sheds light on the necessity of its recircumscription and synopsis of Pontederia L. PhytoKeys 108: 25-83

Pelser, P.B., J.F. Barcelona & D.L. Nickrent (eds.). 2011 onwards. Co's Digital Flora of the Philippines.

Copyright 2011, Co's Digital Flora of the Philippines

Last updated 2 December 2020